[Bug 92926] New: deep freezes when screens go into standby

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92926

            Bug ID: 92926
           Summary: deep freezes when screens go into standby
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: loomsen at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 119608
  --> https://bugs.freedesktop.org/attachment.cgi?id=119608&action=edit
dmesg

Hi.

I'm having a similar problem like
https://bugs.freedesktop.org/show_bug.cgi?id=85606 this. 
I'm running skylake on a 4.3 kernel. When I connect two screens, the computer
completely freezes more often than when I only use a single monitor. I had an
uptime of approx 4 days with a single monitor without any issues. 
After I connected the second screen again, it didn't last that long till the
next freeze came. 
I disconnected the second screen, and after 20+ hours the single screen setup
also froze.

There's nothing in the logs, cause it just completely hangs as described in the
other threads.

I have lots of warnings about WM changed in dmesg, too. dmesg from crashed boot
attached.

Where do I need to add the drm.debug=14? To the kernel line?

xorg-x11-drv-intel-2.99.917
mesa-dri-drivers-11.0.4-1.20151105.fc23.x86_64
kernel 4.3.0

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